245729978 has 8 divisors (see below), whose sum is σ = 396948468. Its totient is φ = 113413824.

The previous prime is 245729971. The next prime is 245730011. The reversal of 245729978 is 879927542.

It can be written as a sum of positive squares in 2 ways, for example, as 242642929 + 3087049 = 15577^2 + 1757^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (245729971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4725551 + ... + 4725602.

Almost surely, 2^245729978 is an apocalyptic number.

245729978 is a deficient number, since it is larger than the sum of its proper divisors (151218490).

245729978 is a wasteful number, since it uses less digits than its factorization.

245729978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9451168.

The product of its digits is 2540160, while the sum is 53.

The square root of 245729978 is about 15675.7767909600. The cubic root of 245729978 is about 626.3533154380.

The spelling of 245729978 in words is "two hundred forty-five million, seven hundred twenty-nine thousand, nine hundred seventy-eight".